如何解析网页以将simplexml_import_dom更改为DOMXPath？ [关闭]

Question

All the links in the web page http://php.net were extracted with simplexml_import_dom in code1.

code1
<?php
$dom = new DOMDocument();
$dom->loadHTMLFile('http://php.net');
$xml = simplexml_import_dom($dom);
$nodes = $xml->xpath('//a[@href]');
foreach ($nodes as $node) {
    echo $node['href'], "<br />
";
}
?>

Now i want parse the web page with DOMXPath,change simplexml_import_dom in code1 into DOMXPath in code2,there is a bug in code2 ,how to fix it?

code2
<?php
$html = file_get_contents('http://php.net');
$dom = new DOMDocument();
$dom->loadHTML($html);
$xpath = new DOMXPath($dom);
$nodes = $xpath->query('//a[@href]');
foreach ($nodes as $node) {
    echo $node['href'], "<br />
";
}
?>

Answer 1

returned data from query is objects not array!

if you get warning like :

Warning: DOMDocument::loadHTML(): Tag nav invalid in Entity

in output you can add this line before loadHTML function call

it because of html5 tag used in document

libxml_use_internal_errors(true);

code :

$html =  file_get_contents('http://php.net');
$dom = new DOMDocument();
$dom->loadHTML($html);
$xpath = new DOMXPath($dom);
$nodes = $xpath->query('//a[@href]');
foreach ($nodes as $node) {
    echo $node->getAttribute("href"), "<br />
";
}